package com.VolunteerPlatform.Service.UtilityService;

import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.sl.usermodel.ColorStyle;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.servlet.http.HttpServletResponse;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * Created by DoveXL on 2018/12/11.
 */
@Repository
@Transactional(rollbackFor = Exception.class)
public class ExportDataExcel {
    //显示的导出表的标题
    private String title;
    //导出表的列名
    private String[] rowName ;

    private List<Object[]> dataList = new ArrayList<Object[]>();

    private String fileName;

    public String getFileName() {
        return fileName;
    }

    public void setFileName(String fileName) {
        this.fileName = fileName;
    }

    HttpServletResponse response;

    public HttpServletResponse getResponse() {
        return response;
    }

    public String[] getRowName() {
        return rowName;
    }

    public void setDataList(List<Object[]> dataList) {
        this.dataList = dataList;
    }

    public void setResponse(HttpServletResponse response) {
        this.response = response;
    }

    public void setRowName(String[] rowName) {
        this.rowName = rowName;
    }

    public List<Object[]> getDataList() {
        return dataList;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public ExportDataExcel()
    {

    }










    //构造方法，传入要导出的数据
    public ExportDataExcel(String title,String[] rowName,List<Object[]> dataList,String fileName){
        this.dataList = dataList;
        this.rowName = rowName;
        this.title = title;
        this.fileName =fileName;
    }

    public void ExportExcel() throws Exception
    {
        try {
            HSSFWorkbook workbook = new HSSFWorkbook();                        // 创建工作簿对象
            HSSFSheet sheet = workbook.createSheet(title);                     // 创建工作表

            // 产生表格标题行
            HSSFRow rowm = sheet.createRow(0);
            HSSFCell cellTiltle = rowm.createCell(0);

            rowm.setHeight((short) (25 * 35)); //设置高度

            //sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面  - 可扩展】
            HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);//获取列头样式对象
            HSSFCellStyle style = this.getStyle(workbook);                    //单元格样式对象

            sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, (rowName.length - 1)));
            cellTiltle.setCellStyle(columnTopStyle);
            cellTiltle.setCellValue(title);

            // 定义所需列数
            int columnNum = rowName.length;
            HSSFRow rowRowName = sheet.createRow(1);                // 在索引2的位置创建行(最顶端的行开始的第二行)

            rowRowName.setHeight((short) (25 * 25)); //设置高度

            // 将列头设置到sheet的单元格中
            for (int n = 0; n < columnNum; n++) {
                HSSFCell cellRowName = rowRowName.createCell(n);                //创建列头对应个数的单元格
                cellRowName.setCellType(CellType.STRING);                //设置列头单元格的数据类型
                HSSFRichTextString text = new HSSFRichTextString(rowName[n]);
                cellRowName.setCellValue(text);                                    //设置列头单元格的值
                cellRowName.setCellStyle(columnTopStyle);                        //设置列头单元格样式
            }

            //将查询出的数据设置到sheet对应的单元格中
            for (int i = 0; i < dataList.size(); i++) {

                Object[] obj = dataList.get(i);//遍历每个对象
                HSSFRow row = sheet.createRow(i + 2);//创建所需的行数

                row.setHeight((short) (25 * 20)); //设置高度

                for (int j = 0; j < obj.length; j++) {
                    HSSFCell cell = null;   //设置单元格的数据类型
                    if (j == 0) {
                        cell = row.createCell(j, CellType.NUMERIC);
                        cell.setCellValue(i + 1);
                    } else {
                        cell = row.createCell(j, CellType.STRING);
                        if (!"".equals(obj[j]) && obj[j] != null) {
                            cell.setCellValue(obj[j].toString());                        //设置单元格的值
                        }
                    }
                    cell.setCellStyle(style);
                }
            }
            //让列宽随着导出的列长自动适应
            for (int colNum = 0; colNum < columnNum; colNum++) {
                int columnWidth = sheet.getColumnWidth(colNum) / 256;
                for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {
                    HSSFRow currentRow;
                    //当前行未被使用过
                    if (sheet.getRow(rowNum) == null) {
                        currentRow = sheet.createRow(rowNum);
                    } else {
                        currentRow = sheet.getRow(rowNum);
                    }
                    if (currentRow.getCell(colNum) != null) {
                        HSSFCell currentCell = currentRow.getCell(colNum);
                        if (currentCell.getCellTypeEnum() == CellType.STRING) {
                            int length = currentCell.getStringCellValue().getBytes().length;
                            if (columnWidth < length) {
                                columnWidth = length;
                            }
                        }
                    }
                }
                if (colNum == 0) {
                    sheet.setColumnWidth(colNum, (columnWidth - 2) * 128);
                } else {
                    sheet.setColumnWidth(colNum, (columnWidth + 4) * 256);
                }
            }

            if (workbook != null) {
                try {
                    /*String fileName = "Excel-" + String.valueOf(System.currentTimeMillis()).substring(4, 13) + ".xls";
                    String headStr = "attachment; filename=\"" + fileName + "\"";
                    response = getResponse();
                    response.setContentType("application/vnd.ms-excel");
                    response.setHeader("Content-Disposition", headStr);
                    OutputStream out = response.getOutputStream();*/
                    FileOutputStream out = new FileOutputStream(getFileName());
                    workbook.write(out);
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }catch(Exception e){
            e.printStackTrace();
        }
    }


    public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {

        // 设置字体
        HSSFFont font = workbook.createFont();
        //设置字体大小
        font.setFontHeightInPoints((short)11);
        //字体加粗
        font.setBold(true);
        //设置字体名字
        font.setFontName("宋体");
        //设置样式;
        HSSFCellStyle style = workbook.createCellStyle();
        //设置底边框;
        style.setBorderBottom(BorderStyle.THIN);
        //设置底边框颜色;
        //style.setBottomBorderColor((short)1);
        //设置左边框;
        style.setBorderLeft(BorderStyle.THIN);
        //设置左边框颜色;
        //style.setLeftBorderColor(HSSFColor.BLACK.index);
        //设置右边框;
        style.setBorderRight(BorderStyle.THIN);
        //设置右边框颜色;
        //style.setRightBorderColor(HSSFColor.BLACK.index);
        //设置顶边框;
        style.setBorderTop(BorderStyle.THIN);
        //设置顶边框颜色;
        //style.setTopBorderColor(HSSFColor.toHSSFColor("").index);
        //在样式用应用设置的字体;
        style.setFont(font);
        //设置自动换行;
        style.setWrapText(false);
        //设置水平对齐的样式为居中对齐;
        style.setAlignment(HorizontalAlignment.CENTER);
        //设置垂直对齐的样式为居中对齐;
        style.setVerticalAlignment(VerticalAlignment.CENTER);

        //设置单元格背景颜色
        style.setFillForegroundColor(IndexedColors.PALE_BLUE.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);

        return style;

    }

    /*
   * 列数据信息单元格样式
   */
    public HSSFCellStyle getStyle(HSSFWorkbook workbook) {
        // 设置字体
        HSSFFont font = workbook.createFont();
        //设置字体大小
        //font.setFontHeightInPoints((short)10);
        //字体加粗
        //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        //设置字体名字
        font.setFontName("宋体");
        //设置样式;
        HSSFCellStyle style = workbook.createCellStyle();
        //设置底边框;
        style.setBorderBottom(BorderStyle.THIN);
        //设置底边框颜色;
        //style.setBottomBorderColor(HSSFColor.BLACK.index);
        //设置左边框;
        style.setBorderLeft(BorderStyle.THIN);
        //设置左边框颜色;
       // style.setLeftBorderColor(HSSFColor.BLACK.index);
        //设置右边框;
        style.setBorderRight(BorderStyle.THIN);
        //设置右边框颜色;
        //style.setRightBorderColor(HSSFColor.BLACK.index);
        //设置顶边框;
        style.setBorderTop(BorderStyle.THIN);
        //设置顶边框颜色;
        //style.setTopBorderColor(HSSFColor.BLACK.index);
        //在样式用应用设置的字体;
        style.setFont(font);
        //设置自动换行;
        style.setWrapText(false);
        //设置水平对齐的样式为居中对齐;
        style.setAlignment(HorizontalAlignment.CENTER);
        //设置垂直对齐的样式为居中对齐;
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        return style;
    }
}
